scholarly journals Trajectory-based POI recommendations for mobile maps

2019 ◽  
Vol 1 ◽  
pp. 1-2
Author(s):  
Shane Loeffler

<p><strong>Abstract.</strong> Providing mobile map users with relevant information about their surroundings based on their current trajectory is a necessary next step in providing them with the information they need or want without requiring direct interaction with the map, which can be dangerous or distracting, as well as time-consuming and annoying. Providing these recommendations requires integrating spatial information from the mobile device’s GPS chip with attributes about the underlying map and point of interest (POI) data, as well as the preferences and goals of the user. The Flyover Country app provides a relatively contained test case for the development of predictive software for recommending current and upcoming POIs during travel.</p>

2021 ◽  
Vol 7 (1) ◽  
pp. 540-555
Author(s):  
Hayley L. Mickleburgh ◽  
Liv Nilsson Stutz ◽  
Harry Fokkens

Abstract The reconstruction of past mortuary rituals and practices increasingly incorporates analysis of the taphonomic history of the grave and buried body, using the framework provided by archaeothanatology. Archaeothanatological analysis relies on interpretation of the three-dimensional (3D) relationship of bones within the grave and traditionally depends on elaborate written descriptions and two-dimensional (2D) images of the remains during excavation to capture this spatial information. With the rapid development of inexpensive 3D tools, digital replicas (3D models) are now commonly available to preserve 3D information on human burials during excavation. A procedure developed using a test case to enhance archaeothanatological analysis and improve post-excavation analysis of human burials is described. Beyond preservation of static spatial information, 3D visualization techniques can be used in archaeothanatology to reconstruct the spatial displacement of bones over time, from deposition of the body to excavation of the skeletonized remains. The purpose of the procedure is to produce 3D simulations to visualize and test archaeothanatological hypotheses, thereby augmenting traditional archaeothanatological analysis. We illustrate our approach with the reconstruction of mortuary practices and burial taphonomy of a Bell Beaker burial from the site of Oostwoud-Tuithoorn, West-Frisia, the Netherlands. This case study was selected as the test case because of its relatively complete context information. The test case shows the potential for application of the procedure to older 2D field documentation, even when the amount and detail of documentation is less than ideal.


2015 ◽  
Vol 19 (10) ◽  
pp. 4377-4396 ◽  
Author(s):  
C. Duku ◽  
H. Rathjens ◽  
S. J. Zwart ◽  
L. Hein

Abstract. Ecosystem accounting is an emerging field that aims to provide a consistent approach to analysing environment–economy interactions. One of the specific features of ecosystem accounting is the distinction between the capacity and the flow of ecosystem services. Ecohydrological modelling to support ecosystem accounting requires considering among others physical and mathematical representation of ecohydrological processes, spatial heterogeneity of the ecosystem, temporal resolution, and required model accuracy. This study examines how a spatially explicit ecohydrological model can be used to analyse multiple hydrological ecosystem services in line with the ecosystem accounting framework. We use the Upper Ouémé watershed in Benin as a test case to demonstrate our approach. The Soil Water and Assessment Tool (SWAT), which has been configured with a grid-based landscape discretization and further enhanced to simulate water flow across the discretized landscape units, is used to simulate the ecohydrology of the Upper Ouémé watershed. Indicators consistent with the ecosystem accounting framework are used to map and quantify the capacities and the flows of multiple hydrological ecosystem services based on the model outputs. Biophysical ecosystem accounts are subsequently set up based on the spatial estimates of hydrological ecosystem services. In addition, we conduct trend analysis statistical tests on biophysical ecosystem accounts to identify trends in changes in the capacity of the watershed ecosystems to provide service flows. We show that the integration of hydrological ecosystem services into an ecosystem accounting framework provides relevant information on ecosystems and hydrological ecosystem services at appropriate scales suitable for decision-making.


2021 ◽  
Vol 12 ◽  
Author(s):  
Caroline Pinte ◽  
Mathis Fleury ◽  
Pierre Maurel

The simultaneous acquisition of electroencephalographic (EEG) signals and functional magnetic resonance images (fMRI) aims to measure brain activity with good spatial and temporal resolution. This bimodal neuroimaging can bring complementary and very relevant information in many cases and in particular for epilepsy. Indeed, it has been shown that it can facilitate the localization of epileptic networks. Regarding the EEG, source localization requires the resolution of a complex inverse problem that depends on several parameters, one of the most important of which is the position of the EEG electrodes on the scalp. These positions are often roughly estimated using fiducial points. In simultaneous EEG-fMRI acquisitions, specific MRI sequences can provide valuable spatial information. In this work, we propose a new fully automatic method based on neural networks to segment an ultra-short echo-time MR volume in order to retrieve the coordinates and labels of the EEG electrodes. It consists of two steps: a segmentation of the images by a neural network, followed by the registration of an EEG template on the obtained detections. We trained the neural network using 37 MR volumes and then we tested our method on 23 new volumes. The results show an average detection accuracy of 99.7% with an average position error of 2.24 mm, as well as 100% accuracy in the labeling.


Author(s):  
Natacha Deroost ◽  
Eric Soetens

We investigated the influence of processing relevant spatial information on learning a probabilistic sequence of irrelevant locations. Using the SRT design of Remillard (2003 ), we found that spatial perceptual learning occurs with paired but not with single targets. The pairs of targets consisted of the same stimuli, but in a different order, so that responses could have been based on the left-right location of an element, relative to the other element of the pair. The prerequisite of spatial pairs of targets suggests that spatial processing of relevant information plays a crucial role in perceptual location learning. In addition, spatial perceptual learning only took place when the target pair was presented together with other stimuli, but was absent when the target pair was presented in a blank field. Since in the latter case attention is automatically captured, this suggests that sequence learning requires endogenous attention.


Author(s):  
Indu Verma ◽  
Amarjeet Kaur ◽  
Iqbaldeep Kaur

Data Mining is extraction of relevant information about data set. A data-warehouse is a location where information is stored. There are various services of data mining, clustering is one of them. Clustering is an effort to group similar data onto single cluster. In this paper we propose and implement k-mean and neural network for clustering same components in single cluster. Clustering reduces the search space by grouping similar test cases together according to the requirements and, hence minimizing the search time, for the retrieval of the test cases, resulting in reduced time complexity. In this research paper we proposed approach for re-usability of test cases by unsupervised approach and supervised approach. In unsupervised learning we proposed k-mean and in supervised learning neural network. We have designed the algorithm for requirement and test case document clustering according to its tf-idf vector space and the output is set of highly cohesive pattern groups.


2021 ◽  
Author(s):  
Julia Kokesch-Himmelreich ◽  
Oliver Wittek ◽  
Alan M. Race ◽  
Sophie Rakete ◽  
Claus Schlicht ◽  
...  

Mass Spectrometry imaging (MS imaging) provides spatial information for a wide range of compound classes in different sample matrices. We used MS imaging to investigate the distribution of components in fresh and processed food, including meat, dairy and bakery products. The MS imaging workflow was optimized to cater to the specific properties and challenges of the individual samples. We successfully detected highly nonpolar and polar constituents such as beta-carotene and anthocyanins, respectively. For the first time, the distribution of a contaminant and a food additive was visualized in processed food. We detected acrylamide in German gingerbread and investigated the penetration of the preservative natamycin into cheese. For this purpose, a new data analysis tool was developed to study the penetration of analytes from uneven surfaces. Our results show that MS imaging has great potential in food analysis to provide relevant information about components' distributions, particularly those underlying official regulations.


2021 ◽  
Vol 22 (2) ◽  
pp. 160-169
Author(s):  
Marciele Keyla Heidmann ◽  
Sumaya Ferreira Guedes

ResumoA Política Nacional de Educação Especial dispõe sobre formas de incluir a pessoa surda no Ensino Regular. Este estudo tem por objetivo analisar a conceituação do termo inclusão na visão de professores, que ministram o componente curricular de Física e Tradutores Intérpretes de Língua de Sinais (TILS), e verificar se a formação acadêmica, entre outras, tem influência na inter-relação com o estudante surdo em sala de aula comum. Para tanto, foram realizadas entrevistas semiestruturadas, de abordagem qualitativa, com tratamento baseado na análise de conteúdo, por meio de três categorias. Os resultados apontam para o despreparo dos professores de Física, perante a ausência de algum tipo de formação direcionada para Libras, seja essa inicial, ou contínua, dificultando o acesso às informações pertinentes, como a conceituação do termo inclusão, inferindo na interação direta com o estudante surdo e na promoção da Educação Inclusiva. Portanto, reflexões acerca da obrigatoriedade do componente curricular de Libras, em conformidade com o Decreto 5.626/2005, pelas Instituições de Ensino Superior, que ofertam cursos de Licenciaturas se faz necessário, assim como a formação continuada de intérpretes de Libras e professores de Física da Educação Básica, em prol a um ensino de qualidade diante da inclusão de estudantes surdos. Palavras-chave: Língua Brasileira de Sinais. Educação Especial. Educação Inclusiva.AbstractThe National Special Education Policy provides for ways to include the deaf in regular education. This study aims to analyze the conceptualization of the term inclusion in the view of teachers who teach the curricular component of Physics and Brazilian Sign Language Interpreters (TILS) and to verify whether academic training, among others, influences the inter-relationship with the deaf student in a common classroom. To this end, semi-structured interviews were conducted, with a qualitative approach, with treatment based on content analysis, through three categories. The results point to the unpreparedness of physics teachers, in the absence of some type of training directed to Brazilian Sign Language, be it initial or continuous, making it difficult to access relevant information, such as the concept of the term inclusion, inferring in the direct interaction with the deaf student and promoting Inclusive Education. Therefore, reflections on the compulsory nature of the Brazilian Sign Language component, in accordance with Decree 5.626 / 2005, by Higher Education institutions, which offer undergraduate courses, are necessary, as well as the continued training of Brazilian Sign Language interpreters and teachers of Basic education physics, in favor of quality teaching in view of the deaf students inclusion. Keywords: Brazilian Sign Language. Special Education. Inclusive Education.


Author(s):  
Greg Young

In this issue of GIS Trends we redefine how libraries can provide spatial information and plunge into the world of mobile maps. To help solve the problem of parking lot overcrowding, we learn how one library has used GIS data, network analysis and modern web technologies to create a unique application designed to connect drivers with the parking spot that is right for them.


2021 ◽  
Vol 28 (10) ◽  
pp. 361-370
Author(s):  
Zachary M. Gemzik ◽  
Margaret M. Donahue ◽  
Amy L. Griffin

Spatial working memory (SWM) is the ability to encode, maintain, and retrieve spatial information over a temporal gap, and relies on a network of structures including the medial septum (MS), which provides critical input to the hippocampus. Although the role of the MS in SWM is well-established, up until recently, we have been unable to use temporally precise circuit manipulation techniques to examine the specific role of the MS in SWM, particularly to distinguish between encoding, maintenance, and retrieval. Here, we test the hypothesis that the MS supports the maintenance of spatial information over a temporal gap using precisely timed optogenetic suppression delivered during specific portions of three different tasks, two of which rely on SWM and one that does not. In experiment 1, we found that MS optogenetic suppression impaired choice accuracy of a SWM dependent conditional discrimination task. Moreover, this deficit was only observed when MS suppression was delivered during the cue-sampling, but not the cue-retrieval, portion of the trial. There was also no deficit when MS neurons were optogenetically suppressed as rats performed a SWM-independent variant of the task. In experiment 2, we tested whether MS suppression affected choice accuracy on a delayed nonmatch to position (DNMP) task when suppression was limited to the sample, delay, and choice phases of the task. We found that MS suppression delivery during the delay phase of the DNMP task, but not during the sample or choice phases, impaired choice accuracy. Our results collectively suggest that the MS plays an important role in SWM by maintaining task-relevant information over a temporal delay.


2014 ◽  
Vol 54 (2) ◽  
pp. 557
Author(s):  
Alec Millett

In its navigation safety and environment protection role, the Australian Maritime Safety Authority (AMSA) is compulsorily consulted by offshore exploration proponents during the preparation of their environmental plans (EPs). AMSA is an interested party regarding the safe navigation of commercial shipping conducting coastal and international trade in all areas, including those where proposed geotechnical, geophysical, or production activities may take place. Acreage releases often overlap busy shipping lanes and, in some cases, International Maritime Organization (IMO) adopted measures that support the safety of shipping and protection of the marine environment. Ships transiting these areas carry cargos of considerable volume and net worth and often substances that are hazardous or dangerous. AMSA, during the proponents’ EP consultation phase, provides advice and assesses navigational and infrastructure risk based on locations of proposed offshore activities and commercial shipping activity. It is apparent that during approval processes, risks related to commercial shipping may not always be fully considered. This can lead to the need for careful expectation management to limit risk exposure. Below are examples where permit areas are shown along with commercial shipping traffic patterns. Commercial shipping and exploration activity can coexist through careful and early communication and adept planning. Maturing marine spatial planning (MSP) processes may provide opportunities to ensure timely and relevant information is shared while adhering to regulatory requirements. This extended abstract and its poster presentation highlight the ability to share spatial information, including commercial vessel traffic information, over a common water space to realise safety and efficiency gains for all concerned.


Sign in / Sign up

Export Citation Format

Share Document